BIOL 1134 Exam 2 | Questions and Answers |
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roots, stems, and leaves
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1 *What is a virus? 2 Ribosomes
3 Vegetative plant parts 4 Countercurrent exchange
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Terms in this set (197)
,*What is a virus? A virus is a small, infectious agent made of nucleic
acid and protein.
*How does a virus infect cells? fuse themselves to the cell membrane and release
their DNA into the cells. Once inside, the viral DNA
changes the functions of cells. The cell is now a cell
that becomes a factory of producing more virus
cells.
*Describe the diversity of A prokaryote is a single-celled organism that lacks
prokaryotes? a nucleus and
membrane-bounded organelles. Bacteria and
archaea are prokaryotes.
*Traits of Bacteria Cell wall typically composed of peptidoglycan
Membrane based on fatty acids
Some use chlorophyll in photosynthesis
Cannot generate methane
Sensitive to streptomycin
Genes do not contain introns
*Traits of archaea Cell wall composed primarily of protein
Membrane based on nonfatty acid lipids
Do not use chlorophyll
Some generate methane
Insensitive to streptomycin
Genes may contain introns
capsid Outer protein coat of a virus
Bacteriophage A virus that infects bacteria
, host range The limited range of host cells that each type of
virus can infect and parasitize.
Steps of virus infection 1. attachment
2. penetration
3. assembly
4. assembly
4. release
lytic pathway Bacteriophage replication pathway in which a virus
immediately replicates in its host and kills it.
lysogenic pathway Bacteriophage replication path in which viral DNA
becomes integrated into the host's chromosome
and is passed to the host's descendants.
Nucleoid A non-membrane-bounded region in a prokaryotic
cell where the DNA is concentrated. (chromosomal
DNA)
Ribosomes site of protein synthesis
Plasmids small circular DNA molecules that replicate
separately from the bacterial chromosome
cell membrane is the outer boundary of the cell; it regulates
what can enter and exit the cell.
cell wall is outside the membrane. It gives the cell its shape
and protects it from osmotic pressure.
Verified Solutions | 2026 Edition | Pass
Guaranteed
Save
Practice questions for this set
Learn 1 /7 Study using Learn
roots, stems, and leaves
Choose an answer
1 *What is a virus? 2 Ribosomes
3 Vegetative plant parts 4 Countercurrent exchange
Don't know?
Terms in this set (197)
,*What is a virus? A virus is a small, infectious agent made of nucleic
acid and protein.
*How does a virus infect cells? fuse themselves to the cell membrane and release
their DNA into the cells. Once inside, the viral DNA
changes the functions of cells. The cell is now a cell
that becomes a factory of producing more virus
cells.
*Describe the diversity of A prokaryote is a single-celled organism that lacks
prokaryotes? a nucleus and
membrane-bounded organelles. Bacteria and
archaea are prokaryotes.
*Traits of Bacteria Cell wall typically composed of peptidoglycan
Membrane based on fatty acids
Some use chlorophyll in photosynthesis
Cannot generate methane
Sensitive to streptomycin
Genes do not contain introns
*Traits of archaea Cell wall composed primarily of protein
Membrane based on nonfatty acid lipids
Do not use chlorophyll
Some generate methane
Insensitive to streptomycin
Genes may contain introns
capsid Outer protein coat of a virus
Bacteriophage A virus that infects bacteria
, host range The limited range of host cells that each type of
virus can infect and parasitize.
Steps of virus infection 1. attachment
2. penetration
3. assembly
4. assembly
4. release
lytic pathway Bacteriophage replication pathway in which a virus
immediately replicates in its host and kills it.
lysogenic pathway Bacteriophage replication path in which viral DNA
becomes integrated into the host's chromosome
and is passed to the host's descendants.
Nucleoid A non-membrane-bounded region in a prokaryotic
cell where the DNA is concentrated. (chromosomal
DNA)
Ribosomes site of protein synthesis
Plasmids small circular DNA molecules that replicate
separately from the bacterial chromosome
cell membrane is the outer boundary of the cell; it regulates
what can enter and exit the cell.
cell wall is outside the membrane. It gives the cell its shape
and protects it from osmotic pressure.
